---
_id: '338'
abstract:
- lang: eng
text: The ample chemical and structural freedom of quaternary compounds permits
engineering materials that fulfill the requirements of a wide variety of applications.
In this work, the mechanisms to achieve unprecedented size, shape, and composition
control in quaternary nanocrystals are detailed. The described procedure allows
obtaining tetrahedral and penta-tetrahedral quaternary nanocrystals with tuned
size distributions and controlled compositions from a plethora of I 2-II-IV-VI
4 semiconductors.
acknowledgement: "This work was supported by the Spanish MICINN Projects MAT2008-05779,
MAT2008-03400-E/MAT, MAT2010-15138, ENE2008-03277-E/CON, CSD2009-00050, and CSD2009-00013.
M.I. thanks the Spanish MICINN for her Ph.D. grant. J.A. and R.Z. also acknowledge
Generalitat de Catalunya 2009-SGR-770 and XaRMAE. A.C. is grateful for financial
support through the Ramon y Cajal program of the Spanish MICINN.\r\n\r\n"
article_processing_charge: No
article_type: original
author:
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Reza
full_name: Zamani, Reza
last_name: Zamani
- first_name: Wenhua
full_name: Li, Wenhua
last_name: Li
- first_name: Alexey
full_name: Shavel, Alexey
last_name: Shavel
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Joan
full_name: Morante, Joan
last_name: Morante
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Ibáñez M, Zamani R, Li W, et al. Extending the nanocrystal synthesis control
to quaternary compositions. Crystal Growth and Design . 2012;12(3):1085-1090.
doi:10.1021/cg201709c
apa: Ibáñez, M., Zamani, R., Li, W., Shavel, A., Arbiol, J., Morante, J., &
Cabot, A. (2012). Extending the nanocrystal synthesis control to quaternary compositions.
Crystal Growth and Design . American Chemical Society (ACS). https://doi.org/10.1021/cg201709c
chicago: Ibáñez, Maria, Reza Zamani, Wenhua Li, Alexey Shavel, Jordi Arbiol, Joan
Morante, and Andreu Cabot. “Extending the Nanocrystal Synthesis Control to Quaternary
Compositions.” Crystal Growth and Design . American Chemical Society (ACS),
2012. https://doi.org/10.1021/cg201709c.
ieee: M. Ibáñez et al., “Extending the nanocrystal synthesis control to quaternary
compositions,” Crystal Growth and Design , vol. 12, no. 3. American Chemical
Society (ACS), pp. 1085–1090, 2012.
ista: Ibáñez M, Zamani R, Li W, Shavel A, Arbiol J, Morante J, Cabot A. 2012. Extending
the nanocrystal synthesis control to quaternary compositions. Crystal Growth and
Design . 12(3), 1085–1090.
mla: Ibáñez, Maria, et al. “Extending the Nanocrystal Synthesis Control to Quaternary
Compositions.” Crystal Growth and Design , vol. 12, no. 3, American Chemical
Society (ACS), 2012, pp. 1085–90, doi:10.1021/cg201709c.
short: M. Ibáñez, R. Zamani, W. Li, A. Shavel, J. Arbiol, J. Morante, A. Cabot,
Crystal Growth and Design 12 (2012) 1085–1090.
date_created: 2018-12-11T11:45:54Z
date_published: 2012-01-01T00:00:00Z
date_updated: 2021-01-12T07:43:05Z
day: '01'
doi: 10.1021/cg201709c
extern: '1'
intvolume: ' 12'
issue: '3'
language:
- iso: eng
month: '01'
oa_version: None
page: 1085 - 1090
publication: 'Crystal Growth and Design '
publication_status: published
publisher: American Chemical Society (ACS)
publist_id: '7488'
quality_controlled: '1'
status: public
title: Extending the nanocrystal synthesis control to quaternary compositions
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 12
year: '2012'
...
---
_id: '339'
abstract:
- lang: eng
text: A high-yield and upscalable colloidal synthesis route for the production of
quaternary I 2-II-IV-VI 4 nanocrystals, particularly stannite Cu 2+xCd 1-xSnSe
4, with narrow size distribution and precisely controlled composition is presented.
It is also shown here how the diversity of valences in the constituent elements
allows an effective control of their electrical conductivity through the adjustment
of the cation ratios. At the same time, while the crystallographic complexity
of quaternary chalcogenides is associated with intrinsically low thermal conductivities,
the reduction of the lattice dimensions to the nanoscale further reduces the materials
thermal conductivity. In the specific case of the stannite crystal structure,
a convenient slab distribution of the valence band maximum states permits a partial
decoupling of the p-type electrical conductivity from both the Seebeck coefficient
and the thermal conductivity. Combining these features, we demonstrate how an
initial optimization of the nanocrystals Cd/Cu ratio allowed us to obtain low-temperature
solution-processed materials with ZT values up to 0.71 at 685 K.
acknowledgement: This work was supported by the Spanish MICINN Projects MAT2008-05779,
MAT2008-03400-E/MAT, MAT2010-15138, ENE2008-03277-E/CON, CSD2009-00050. and CSD2009-00013.
M.I. and N.G.-C. thank the Spanish MICINN for the PhD grant. J.A. and R.Z. also
acknowledge Generalitat de Catalunya 2009-SGR-770 and XaRMAE. A.C. is thankful for
financial support through the Ramon y Cajal program of the Spanish MICINN. N.G.-C.
and J.D.P. are thankful for the computer resources, technical expertise and assistance
provided by the Barcelona Supercomputing Center - Centro Nacional de Supercomputación.
article_processing_charge: No
article_type: original
author:
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Reza
full_name: Zamani, Reza
last_name: Zamani
- first_name: Nuria
full_name: García Castelló, Nuria
last_name: García Castelló
- first_name: Victora
full_name: Izquierdo Roca, Victora
last_name: Izquierdo Roca
- first_name: Wenhua
full_name: Li, Wenhua
last_name: Li
- first_name: Andrew
full_name: Fairbrother, Andrew
last_name: Fairbrother
- first_name: Joan
full_name: Prades, Joan
last_name: Prades
- first_name: Alexey
full_name: Shavel, Alexey
last_name: Shavel
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Alejandro
full_name: Pérez Rodríguez, Alejandro
last_name: Pérez Rodríguez
- first_name: Joan
full_name: Morante, Joan
last_name: Morante
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: 'Ibáñez M, Cadavid D, Zamani R, et al. Composition control and thermoelectric
properties of quaternary chalcogenide nanocrystals: The case of stannite Cu2CdSnSe4.
Chemistry of Materials. 2012;24(3):562-570. doi:10.1021/cm2031812'
apa: 'Ibáñez, M., Cadavid, D., Zamani, R., García Castelló, N., Izquierdo Roca,
V., Li, W., … Cabot, A. (2012). Composition control and thermoelectric properties
of quaternary chalcogenide nanocrystals: The case of stannite Cu2CdSnSe4. Chemistry
of Materials. American Chemical Society. https://doi.org/10.1021/cm2031812'
chicago: 'Ibáñez, Maria, Doris Cadavid, Reza Zamani, Nuria García Castelló, Victora
Izquierdo Roca, Wenhua Li, Andrew Fairbrother, et al. “Composition Control and
Thermoelectric Properties of Quaternary Chalcogenide Nanocrystals: The Case of
Stannite Cu2CdSnSe4.” Chemistry of Materials. American Chemical Society,
2012. https://doi.org/10.1021/cm2031812.'
ieee: 'M. Ibáñez et al., “Composition control and thermoelectric properties
of quaternary chalcogenide nanocrystals: The case of stannite Cu2CdSnSe4,” Chemistry
of Materials, vol. 24, no. 3. American Chemical Society, pp. 562–570, 2012.'
ista: 'Ibáñez M, Cadavid D, Zamani R, García Castelló N, Izquierdo Roca V, Li W,
Fairbrother A, Prades J, Shavel A, Arbiol J, Pérez Rodríguez A, Morante J, Cabot
A. 2012. Composition control and thermoelectric properties of quaternary chalcogenide
nanocrystals: The case of stannite Cu2CdSnSe4. Chemistry of Materials. 24(3),
562–570.'
mla: 'Ibáñez, Maria, et al. “Composition Control and Thermoelectric Properties of
Quaternary Chalcogenide Nanocrystals: The Case of Stannite Cu2CdSnSe4.” Chemistry
of Materials, vol. 24, no. 3, American Chemical Society, 2012, pp. 562–70,
doi:10.1021/cm2031812.'
short: M. Ibáñez, D. Cadavid, R. Zamani, N. García Castelló, V. Izquierdo Roca,
W. Li, A. Fairbrother, J. Prades, A. Shavel, J. Arbiol, A. Pérez Rodríguez, J.
Morante, A. Cabot, Chemistry of Materials 24 (2012) 562–570.
date_created: 2018-12-11T11:45:54Z
date_published: 2012-01-31T00:00:00Z
date_updated: 2021-01-12T07:43:09Z
day: '31'
doi: 10.1021/cm2031812
extern: '1'
intvolume: ' 24'
issue: '3'
language:
- iso: eng
month: '01'
oa_version: None
page: 562 - 570
publication: Chemistry of Materials
publication_status: published
publisher: American Chemical Society
publist_id: '7489'
quality_controlled: '1'
status: public
title: 'Composition control and thermoelectric properties of quaternary chalcogenide
nanocrystals: The case of stannite Cu2CdSnSe4'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 24
year: '2012'
...
---
_id: '345'
abstract:
- lang: eng
text: 'Nanocomposites are highly promising materials to enhance the efficiency of
current thermoelectric devices. A straightforward and at the same time highly
versatile and controllable approach to produce nanocomposites is the assembly
of solution-processed nanocrystal building blocks. The convenience of this bottom-up
approach to produce nanocomposites with homogeneous phase distributions and adjustable
composition is demonstrated here by blending Ag2Te and PbTe colloidal nanocrystals
to form Ag2Te–PbTe bulk nanocomposites. The thermoelectric properties of these
nanocomposites are analyzed in the temperature range from 300 to 700 K. The evolution
of their electrical conductivity and Seebeck coefficient is discussed in terms
of the blend composition and the characteristics of the constituent materials. '
acknowledgement: Acknowledgments The research was supported by the European Regional
Development Funds and the Spanish MICINN Projects MAT2008-05779, MAT2008-03400-E/MAT,
MAT2010-15138, MAT2010-21510, CSD2009-00050, and ENE2008-03277-E/CON. M.I. is grateful
to the Spanish MIC-INN for her PhD grant. A. Cirera acknowledges support from ICREA
Academia program. A. Cabot is grateful to the Spanish MICINN for financial support
through the Ramón y Cajal program.
article_processing_charge: No
article_type: original
author:
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Stéphane
full_name: Gorsse, Stéphane
last_name: Gorsse
- first_name: Antonio
full_name: López, Antonio
last_name: López
- first_name: Albert
full_name: Cirera, Albert
last_name: Cirera
- first_name: Joan
full_name: Morante, Joan
last_name: Morante
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: 'Cadavid D, Ibáñez M, Gorsse S, et al. Bottom-up processing of thermoelectric
nanocomposites from colloidal nanocrystal building blocks: The case of Ag2Te–PbTe.
Journal of Nanoparticle Research. 2012;14(12). doi:10.1007/s11051-012-1328-0'
apa: 'Cadavid, D., Ibáñez, M., Gorsse, S., López, A., Cirera, A., Morante, J., &
Cabot, A. (2012). Bottom-up processing of thermoelectric nanocomposites from colloidal
nanocrystal building blocks: The case of Ag2Te–PbTe. Journal of Nanoparticle
Research. Kluwer. https://doi.org/10.1007/s11051-012-1328-0'
chicago: 'Cadavid, Doris, Maria Ibáñez, Stéphane Gorsse, Antonio López, Albert Cirera,
Joan Morante, and Andreu Cabot. “Bottom-up Processing of Thermoelectric Nanocomposites
from Colloidal Nanocrystal Building Blocks: The Case of Ag2Te–PbTe.” Journal
of Nanoparticle Research. Kluwer, 2012. https://doi.org/10.1007/s11051-012-1328-0.'
ieee: 'D. Cadavid et al., “Bottom-up processing of thermoelectric nanocomposites
from colloidal nanocrystal building blocks: The case of Ag2Te–PbTe,” Journal
of Nanoparticle Research, vol. 14, no. 12. Kluwer, 2012.'
ista: 'Cadavid D, Ibáñez M, Gorsse S, López A, Cirera A, Morante J, Cabot A. 2012.
Bottom-up processing of thermoelectric nanocomposites from colloidal nanocrystal
building blocks: The case of Ag2Te–PbTe. Journal of Nanoparticle Research. 14(12).'
mla: 'Cadavid, Doris, et al. “Bottom-up Processing of Thermoelectric Nanocomposites
from Colloidal Nanocrystal Building Blocks: The Case of Ag2Te–PbTe.” Journal
of Nanoparticle Research, vol. 14, no. 12, Kluwer, 2012, doi:10.1007/s11051-012-1328-0.'
short: D. Cadavid, M. Ibáñez, S. Gorsse, A. López, A. Cirera, J. Morante, A. Cabot,
Journal of Nanoparticle Research 14 (2012).
date_created: 2018-12-11T11:45:56Z
date_published: 2012-12-01T00:00:00Z
date_updated: 2021-01-12T07:43:32Z
day: '01'
doi: 10.1007/s11051-012-1328-0
extern: '1'
intvolume: ' 14'
issue: '12'
language:
- iso: eng
month: '12'
oa_version: None
publication: Journal of Nanoparticle Research
publication_status: published
publisher: Kluwer
publist_id: '7485'
quality_controlled: '1'
status: public
title: 'Bottom-up processing of thermoelectric nanocomposites from colloidal nanocrystal
building blocks: The case of Ag2Te–PbTe'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 14
year: '2012'
...
---
_id: '346'
abstract:
- lang: eng
text: Arrays of vertically aligned ZnO : Cl/TiO2 and ZnO : Cl/ZnxTiOy/TiO2 core–shell
nanowires (NWs) were prepared by means of the combination of two solution-growth
processes. First, single-crystal ZnO NWs with controlled n-type doping were grown
on conducting substrates by a low-cost, high-yield and seed-free electrochemical
route. These NWs were covered by a titanium oxide shell of tunable thickness mediating
successive adsorption-hydrolysis-condensation steps. Using this atomic-layer growth
procedure, titania shells with controlled thickness and the anatase TiO2 phase
were obtained after sintering at 450 °C. Higher sintering temperatures resulted
in the formation of ZnO : Cl/ZnxTiOy/TiO2 core–shell NWs by the interdiffusion
of Zn and Ti ions at the ZnO–TiO2 interface. The performance of ZnO : Cl/TiO2
and ZnO : Cl/ZnxTiOy/TiO2 core–shell NWs towards photoelectrochemical (PEC) water
splitting was investigated as a function of the titania shell thickness. Furthermore,
the performance of such core–shell NWs as photoelectrodes in dye-sensitized solar
cells was also characterized. The TiO2 presence at the ZnO : Cl surface promoted
a two-fold increase on the produced photocurrent densities, probing their potential
for PEC and optoelectronic applications. Electrochemical impedance spectroscopy
was used to corroborate the lower resistance for charge transfer between the NWs
and the electrolyte in the presence of the TiO2 shell.
acknowledgement: The research was supported by the European Regional Development Funds
and the Spanish MICINN projects MAT2010-15138, MAT2010-21510 and CSD2009-00050.
JF and AS thank the FI-DGR and BP grants from the Agència de Gestió d'Ajuts Universitaris
i de Recerca (AGAUR) from the Catalan Government. MI and AC thank the Spanish MICINN
for the PhD grant and the financial support through the Ramóny Cajal program.
article_processing_charge: No
article_type: original
author:
- first_name: Jiandong
full_name: Fan, Jiandong
last_name: Fan
- first_name: Reza
full_name: Zamani, Reza
last_name: Zamani
- first_name: Cristina
full_name: Fábrega, Cristina
last_name: Fábrega
- first_name: Alexey
full_name: Shavel, Alexey
last_name: Shavel
- first_name: Cristina
full_name: Flox, Cristina
last_name: Flox
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Teresa
full_name: Andreu, Teresa
last_name: Andreu
- first_name: Amtonio
full_name: López, Amtonio
last_name: López
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Joan
full_name: Morante, Joan
last_name: Morante
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: 'Fan J, Zamani R, Fábrega C, et al. Solution-growth and optoelectronic performance
of ZnO : Cl/TiO2 and ZnO : Cl/ZnxTiOy/TiO2 core–shell nanowires with tunable shell
thickness. Journal of Physics D: Applied Physics. 2012;45(41). doi:10.1088/0022-3727/45/41/415301'
apa: 'Fan, J., Zamani, R., Fábrega, C., Shavel, A., Flox, C., Ibáñez, M., … Cabot,
A. (2012). Solution-growth and optoelectronic performance of ZnO : Cl/TiO2 and
ZnO : Cl/ZnxTiOy/TiO2 core–shell nanowires with tunable shell thickness. Journal
of Physics D: Applied Physics. IOP Publishing Ltd. https://doi.org/10.1088/0022-3727/45/41/415301'
chicago: 'Fan, Jiandong, Reza Zamani, Cristina Fábrega, Alexey Shavel, Cristina
Flox, Maria Ibáñez, Teresa Andreu, et al. “Solution-Growth and Optoelectronic
Performance of ZnO : Cl/TiO2 and ZnO : Cl/ZnxTiOy/TiO2 Core–Shell Nanowires with
Tunable Shell Thickness.” Journal of Physics D: Applied Physics. IOP Publishing
Ltd., 2012. https://doi.org/10.1088/0022-3727/45/41/415301.'
ieee: 'J. Fan et al., “Solution-growth and optoelectronic performance of
ZnO : Cl/TiO2 and ZnO : Cl/ZnxTiOy/TiO2 core–shell nanowires with tunable shell
thickness,” Journal of Physics D: Applied Physics, vol. 45, no. 41. IOP
Publishing Ltd., 2012.'
ista: 'Fan J, Zamani R, Fábrega C, Shavel A, Flox C, Ibáñez M, Andreu T, López A,
Arbiol J, Morante J, Cabot A. 2012. Solution-growth and optoelectronic performance
of ZnO : Cl/TiO2 and ZnO : Cl/ZnxTiOy/TiO2 core–shell nanowires with tunable shell
thickness. Journal of Physics D: Applied Physics. 45(41).'
mla: 'Fan, Jiandong, et al. “Solution-Growth and Optoelectronic Performance of ZnO : Cl/TiO2
and ZnO : Cl/ZnxTiOy/TiO2 Core–Shell Nanowires with Tunable Shell Thickness.”
Journal of Physics D: Applied Physics, vol. 45, no. 41, IOP Publishing
Ltd., 2012, doi:10.1088/0022-3727/45/41/415301.'
short: 'J. Fan, R. Zamani, C. Fábrega, A. Shavel, C. Flox, M. Ibáñez, T. Andreu,
A. López, J. Arbiol, J. Morante, A. Cabot, Journal of Physics D: Applied Physics
45 (2012).'
date_created: 2018-12-11T11:45:56Z
date_published: 2012-10-17T00:00:00Z
date_updated: 2021-01-12T07:43:36Z
day: '17'
doi: 10.1088/0022-3727/45/41/415301
extern: '1'
intvolume: ' 45'
issue: '41'
language:
- iso: eng
month: '10'
oa_version: None
publication: 'Journal of Physics D: Applied Physics'
publication_status: published
publisher: IOP Publishing Ltd.
publist_id: '7486'
quality_controlled: '1'
status: public
title: Solution-growth and optoelectronic performance of ZnO : Cl/TiO2 and ZnO : Cl/ZnxTiOy/TiO2
core–shell nanowires with tunable shell thickness
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 45
year: '2012'
...
---
_id: '347'
abstract:
- lang: eng
text: 'A synthetic route for producing Cu 2ZnGeSe 4 nanocrystals with narrow size
distributions and controlled composition is presented. These nanocrystals were
used to produce densely packed nanomaterials by hot-pressing. From the characterization
of the thermoelectric properties of these nanomaterials, Cu 2ZnGeSe 4 is demonstrated
to show excellent thermoelectric properties. A very preliminary adjustment of
the nanocrystal composition has already resulted in a figure of merit of up to
0.55 at 450°C. '
acknowledgement: This work was supported by the Spanish MICINN Projects MAT2008-05779,
MAT2008-03400-E/MAT, MAT2010-15138, ENE2008-03277-E/CON, CSD2009-00050, and CSD2009-00013.
M.I. thanks the Spanish MICINN for her Ph.D. Grant. J.A. and R.Z. also acknowledge
Generalitat de Catalunya 2009-SGR-770 and XaRMAE. A.C. is thankful for financial
support through the Ramon y Cajal Program of the Spanish MICINN.
article_processing_charge: No
article_type: original
author:
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Reza
full_name: Zamani, Reza
last_name: Zamani
- first_name: Aaron
full_name: Lalonde, Aaron
last_name: Lalonde
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Wenhua
full_name: Li, Wenhua
last_name: Li
- first_name: Alexey
full_name: Shavel, Alexey
last_name: Shavel
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Joan
full_name: Morante, Joan
last_name: Morante
- first_name: Stéphane
full_name: Gorsse, Stéphane
last_name: Gorsse
- first_name: G Jeffrey
full_name: Snyder, G Jeffrey
last_name: Snyder
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: 'Ibáñez M, Zamani R, Lalonde A, et al. Cu 2ZnGeSe 4 nanocrystals: Synthesis
and thermoelectric properties. Journal of the American Chemical Society.
2012;134(9):4060-4063. doi:10.1021/ja211952z'
apa: 'Ibáñez, M., Zamani, R., Lalonde, A., Cadavid, D., Li, W., Shavel, A., … Cabot,
A. (2012). Cu 2ZnGeSe 4 nanocrystals: Synthesis and thermoelectric properties.
Journal of the American Chemical Society. ACS. https://doi.org/10.1021/ja211952z'
chicago: 'Ibáñez, Maria, Reza Zamani, Aaron Lalonde, Doris Cadavid, Wenhua Li, Alexey
Shavel, Jordi Arbiol, et al. “Cu 2ZnGeSe 4 Nanocrystals: Synthesis and Thermoelectric
Properties.” Journal of the American Chemical Society. ACS, 2012. https://doi.org/10.1021/ja211952z.'
ieee: 'M. Ibáñez et al., “Cu 2ZnGeSe 4 nanocrystals: Synthesis and thermoelectric
properties,” Journal of the American Chemical Society, vol. 134, no. 9.
ACS, pp. 4060–4063, 2012.'
ista: 'Ibáñez M, Zamani R, Lalonde A, Cadavid D, Li W, Shavel A, Arbiol J, Morante
J, Gorsse S, Snyder GJ, Cabot A. 2012. Cu 2ZnGeSe 4 nanocrystals: Synthesis and
thermoelectric properties. Journal of the American Chemical Society. 134(9), 4060–4063.'
mla: 'Ibáñez, Maria, et al. “Cu 2ZnGeSe 4 Nanocrystals: Synthesis and Thermoelectric
Properties.” Journal of the American Chemical Society, vol. 134, no. 9,
ACS, 2012, pp. 4060–63, doi:10.1021/ja211952z.'
short: M. Ibáñez, R. Zamani, A. Lalonde, D. Cadavid, W. Li, A. Shavel, J. Arbiol,
J. Morante, S. Gorsse, G.J. Snyder, A. Cabot, Journal of the American Chemical
Society 134 (2012) 4060–4063.
date_created: 2018-12-11T11:45:57Z
date_published: 2012-03-07T00:00:00Z
date_updated: 2021-01-12T07:43:40Z
day: '07'
doi: 10.1021/ja211952z
extern: '1'
intvolume: ' 134'
issue: '9'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://authors.library.caltech.edu/30261/
month: '03'
oa: 1
oa_version: None
page: 4060 - 4063
publication: Journal of the American Chemical Society
publication_status: published
publisher: ACS
publist_id: '7487'
quality_controlled: '1'
status: public
title: 'Cu 2ZnGeSe 4 nanocrystals: Synthesis and thermoelectric properties'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 134
year: '2012'
...
---
_id: '377'
abstract:
- lang: eng
text: The potential to control the composition and crystal phase at the nanometer
scale enable the production of nanocrystalline materials with enhanced functionalities
and new applications. In the present work, we detail a novel colloidal synthesis
route to prepare nanoparticles of the ternary semiconductor Cu2GeSe3 (CGSe) with
nanometer-scale control over their crystal phases. We also demonstrate the structural
effect on the thermoelectric properties of bottom-up-prepared CGSe nanomaterials.
By careful adjustment of the nucleation and growth temperatures, pure orthorhombic
CGSe nanoparticles with cationic order or polytypic CGSe nanoparticles with disordered
cation positions can be produced. In this second type of nanoparticle, a high
density of twins can be created to periodically change the atomic plane stacking,
forming a hexagonal wurtzite CGSe phase. The high yield of the synthetic routes
reported here allows the production of single-phase and multiphase CGSe nanoparticles
in the gram scale, which permits characterization of the thermoelectric properties
of these materials. Reduced thermal conductivities and a related 2.5-fold increase
of the thermoelectric figure of merit for multiphase nanomaterials compared to
pure-phase CGSe are systematically obtained. These results are discussed in terms
of the density and efficiency of phonon scattering centers in both types of materials.
article_processing_charge: No
author:
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Reza
full_name: Zamani, Reza
last_name: Zamani
- first_name: Wenhua
full_name: Li, Wenhua
last_name: Li
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Stéphane
full_name: Gorse, Stéphane
last_name: Gorse
- first_name: Nebll
full_name: Katchoi, Nebll
last_name: Katchoi
- first_name: Alexey
full_name: Shavel, Alexey
last_name: Shavel
- first_name: Antonioo
full_name: López, Antonioo
last_name: López
- first_name: Joan
full_name: Morante, Joan
last_name: Morante
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: 'Ibáñez M, Zamani R, Li W, et al. Crystallographic control at the nanoscale
to enhance functionality: Polytypic Cu2GeSe3 nanoparticles as thermoelectric materials.
Chemistry of Materials. 2012;24(23):4615-4622. doi:10.1021/cm303252q'
apa: 'Ibáñez, M., Zamani, R., Li, W., Cadavid, D., Gorse, S., Katchoi, N., … Cabot,
A. (2012). Crystallographic control at the nanoscale to enhance functionality:
Polytypic Cu2GeSe3 nanoparticles as thermoelectric materials. Chemistry of
Materials. American Chemical Society. https://doi.org/10.1021/cm303252q'
chicago: 'Ibáñez, Maria, Reza Zamani, Wenhua Li, Doris Cadavid, Stéphane Gorse,
Nebll Katchoi, Alexey Shavel, et al. “Crystallographic Control at the Nanoscale
to Enhance Functionality: Polytypic Cu2GeSe3 Nanoparticles as Thermoelectric Materials.”
Chemistry of Materials. American Chemical Society, 2012. https://doi.org/10.1021/cm303252q.'
ieee: 'M. Ibáñez et al., “Crystallographic control at the nanoscale to enhance
functionality: Polytypic Cu2GeSe3 nanoparticles as thermoelectric materials,”
Chemistry of Materials, vol. 24, no. 23. American Chemical Society, pp.
4615–4622, 2012.'
ista: 'Ibáñez M, Zamani R, Li W, Cadavid D, Gorse S, Katchoi N, Shavel A, López
A, Morante J, Arbiol J, Cabot A. 2012. Crystallographic control at the nanoscale
to enhance functionality: Polytypic Cu2GeSe3 nanoparticles as thermoelectric materials.
Chemistry of Materials. 24(23), 4615–4622.'
mla: 'Ibáñez, Maria, et al. “Crystallographic Control at the Nanoscale to Enhance
Functionality: Polytypic Cu2GeSe3 Nanoparticles as Thermoelectric Materials.”
Chemistry of Materials, vol. 24, no. 23, American Chemical Society, 2012,
pp. 4615–22, doi:10.1021/cm303252q.'
short: M. Ibáñez, R. Zamani, W. Li, D. Cadavid, S. Gorse, N. Katchoi, A. Shavel,
A. López, J. Morante, J. Arbiol, A. Cabot, Chemistry of Materials 24 (2012) 4615–4622.
date_created: 2018-12-11T11:46:07Z
date_published: 2012-11-14T00:00:00Z
date_updated: 2021-01-12T07:52:04Z
day: '14'
doi: 10.1021/cm303252q
extern: '1'
intvolume: ' 24'
issue: '23'
language:
- iso: eng
month: '11'
oa_version: None
page: 4615 - 4622
publication: Chemistry of Materials
publication_status: published
publisher: American Chemical Society
publist_id: '7452'
status: public
title: 'Crystallographic control at the nanoscale to enhance functionality: Polytypic
Cu2GeSe3 nanoparticles as thermoelectric materials'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 24
year: '2012'
...
---
_id: '3836'
abstract:
- lang: eng
text: Hierarchical Timing Language (HTL) is a coordination language for distributed,
hard real-time applications. HTL is a hierarchical extension of Giotto and, like
its predecessor, based on the logical execution time (LET) paradigm of real-time
programming. Giotto is compiled into code for a virtual machine, called the EmbeddedMachine
(or E machine). If HTL is targeted to the E machine, then the hierarchicalprogram
structure needs to be flattened; the flattening makes separatecompilation difficult,
and may result in E machinecode of exponential size. In this paper, we propose
a generalization of the E machine, which supports a hierarchicalprogram structure
at runtime through real-time trigger mechanisms that are arranged in a tree. We
present the generalized E machine, and a modular compiler for HTL that generates
code of linear size. The compiler may generate code for any part of a given HTL
program separately in any order.
article_processing_charge: No
author:
- first_name: Arkadeb
full_name: Ghosal, Arkadeb
last_name: Ghosal
- first_name: Daniel
full_name: Iercan, Daniel
last_name: Iercan
- first_name: Christoph
full_name: Kirsch, Christoph
last_name: Kirsch
- first_name: Thomas A
full_name: Henzinger, Thomas A
id: 40876CD8-F248-11E8-B48F-1D18A9856A87
last_name: Henzinger
orcid: 0000−0002−2985−7724
- first_name: Alberto
full_name: Sangiovanni Vincentelli, Alberto
last_name: Sangiovanni Vincentelli
citation:
ama: Ghosal A, Iercan D, Kirsch C, Henzinger TA, Sangiovanni Vincentelli A. Separate
compilation of hierarchical real-time programs into linear-bounded embedded machine
code. Science of Computer Programming. 2012;77(2):96-112. doi:10.1016/j.scico.2010.06.004
apa: Ghosal, A., Iercan, D., Kirsch, C., Henzinger, T. A., & Sangiovanni Vincentelli,
A. (2012). Separate compilation of hierarchical real-time programs into linear-bounded
embedded machine code. Science of Computer Programming. Elsevier. https://doi.org/10.1016/j.scico.2010.06.004
chicago: Ghosal, Arkadeb, Daniel Iercan, Christoph Kirsch, Thomas A Henzinger, and
Alberto Sangiovanni Vincentelli. “Separate Compilation of Hierarchical Real-Time
Programs into Linear-Bounded Embedded Machine Code.” Science of Computer Programming.
Elsevier, 2012. https://doi.org/10.1016/j.scico.2010.06.004.
ieee: A. Ghosal, D. Iercan, C. Kirsch, T. A. Henzinger, and A. Sangiovanni Vincentelli,
“Separate compilation of hierarchical real-time programs into linear-bounded embedded
machine code,” Science of Computer Programming, vol. 77, no. 2. Elsevier,
pp. 96–112, 2012.
ista: Ghosal A, Iercan D, Kirsch C, Henzinger TA, Sangiovanni Vincentelli A. 2012.
Separate compilation of hierarchical real-time programs into linear-bounded embedded
machine code. Science of Computer Programming. 77(2), 96–112.
mla: Ghosal, Arkadeb, et al. “Separate Compilation of Hierarchical Real-Time Programs
into Linear-Bounded Embedded Machine Code.” Science of Computer Programming,
vol. 77, no. 2, Elsevier, 2012, pp. 96–112, doi:10.1016/j.scico.2010.06.004.
short: A. Ghosal, D. Iercan, C. Kirsch, T.A. Henzinger, A. Sangiovanni Vincentelli,
Science of Computer Programming 77 (2012) 96–112.
date_created: 2018-12-11T12:05:26Z
date_published: 2012-02-01T00:00:00Z
date_updated: 2025-09-30T07:33:11Z
day: '01'
department:
- _id: ToHe
doi: 10.1016/j.scico.2010.06.004
external_id:
isi:
- '000298464800003'
intvolume: ' 77'
isi: 1
issue: '2'
language:
- iso: eng
month: '02'
oa_version: None
page: 96 - 112
publication: Science of Computer Programming
publication_status: published
publisher: Elsevier
publist_id: '2370'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Separate compilation of hierarchical real-time programs into linear-bounded
embedded machine code
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 77
year: '2012'
...
---
_id: '3846'
abstract:
- lang: eng
text: We summarize classical and recent results about two-player games played on
graphs with ω-regular objectives. These games have applications in the verification
and synthesis of reactive systems. Important distinctions are whether a graph
game is turn-based or concurrent; deterministic or stochastic; zero-sum or not.
We cluster known results and open problems according to these classifications.
acknowledgement: This research was supported in part by the ONR grant N00014-02-1-0671,
by the AFOSR MURI grant F49620-00-1-0327, and by the NSF grants CCR-9988172, CCR-0085949,
and CCR-0225610.
article_processing_charge: No
article_type: original
author:
- first_name: Krishnendu
full_name: Chatterjee, Krishnendu
id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
last_name: Chatterjee
orcid: 0000-0002-4561-241X
- first_name: Thomas A
full_name: Henzinger, Thomas A
id: 40876CD8-F248-11E8-B48F-1D18A9856A87
last_name: Henzinger
orcid: 0000−0002−2985−7724
citation:
ama: Chatterjee K, Henzinger TA. A survey of stochastic ω regular games. Journal
of Computer and System Sciences. 2012;78(2):394-413. doi:10.1016/j.jcss.2011.05.002
apa: Chatterjee, K., & Henzinger, T. A. (2012). A survey of stochastic ω regular
games. Journal of Computer and System Sciences. Elsevier. https://doi.org/10.1016/j.jcss.2011.05.002
chicago: Chatterjee, Krishnendu, and Thomas A Henzinger. “A Survey of Stochastic
ω Regular Games.” Journal of Computer and System Sciences. Elsevier, 2012.
https://doi.org/10.1016/j.jcss.2011.05.002.
ieee: K. Chatterjee and T. A. Henzinger, “A survey of stochastic ω regular games,”
Journal of Computer and System Sciences, vol. 78, no. 2. Elsevier, pp.
394–413, 2012.
ista: Chatterjee K, Henzinger TA. 2012. A survey of stochastic ω regular games.
Journal of Computer and System Sciences. 78(2), 394–413.
mla: Chatterjee, Krishnendu, and Thomas A. Henzinger. “A Survey of Stochastic ω
Regular Games.” Journal of Computer and System Sciences, vol. 78, no. 2,
Elsevier, 2012, pp. 394–413, doi:10.1016/j.jcss.2011.05.002.
short: K. Chatterjee, T.A. Henzinger, Journal of Computer and System Sciences 78
(2012) 394–413.
corr_author: '1'
date_created: 2018-12-11T12:05:29Z
date_published: 2012-03-02T00:00:00Z
date_updated: 2025-09-30T07:32:39Z
day: '02'
ddc:
- '000'
department:
- _id: KrCh
- _id: ToHe
doi: 10.1016/j.jcss.2011.05.002
external_id:
isi:
- '000299719100002'
file:
- access_level: open_access
checksum: 241b939deb4517cdd4426d49c67e3fa2
content_type: application/pdf
creator: kschuh
date_created: 2019-01-29T10:54:28Z
date_updated: 2020-07-14T12:46:17Z
file_id: '5897'
file_name: a_survey_of_stochastic_omega-regular_games.pdf
file_size: 336450
relation: main_file
file_date_updated: 2020-07-14T12:46:17Z
has_accepted_license: '1'
intvolume: ' 78'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1016/j.jcss.2011.05.002
month: '03'
oa: 1
oa_version: Submitted Version
page: 394 - 413
publication: Journal of Computer and System Sciences
publication_status: published
publisher: Elsevier
publist_id: '2341'
quality_controlled: '1'
scopus_import: '1'
status: public
title: A survey of stochastic ω regular games
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 78
year: '2012'
...
---
_id: '387'
abstract:
- lang: eng
text: In this Letter we present detailed study of the density of states near defects
in Bi 2Se 3. In particular, we present data on the commonly found triangular defects
in this system. While we do not find any measurable quasiparticle scattering interference
effects, we do find localized resonances, which can be well fitted by theory once
the potential is taken to be extended to properly account for the observed defects.
The data together with the fits confirm that while the local density of states
around the Dirac point of the electronic spectrum at the surface is significantly
disrupted near the impurity by the creation of low-energy resonance state, the
Dirac point is not locally destroyed. We discuss our results in terms of the expected
protected surface state of topological insulators. © 2012 American Physical Society.
author:
- first_name: Zhanybek
full_name: Alpichshev, Zhanybek
id: 45E67A2A-F248-11E8-B48F-1D18A9856A87
last_name: Alpichshev
orcid: 0000-0002-7183-5203
- first_name: Rudro
full_name: Biswas, Rudro
last_name: Biswas
- first_name: Alexander
full_name: Balatsky, Alexander
last_name: Balatsky
- first_name: James
full_name: Analytis, James
last_name: Analytis
- first_name: Jiunhaw
full_name: Chu, Jiunhaw
last_name: Chu
- first_name: Ian
full_name: Fisher, Ian
last_name: Fisher
- first_name: Aharon
full_name: Kapitulnik, Aharon
last_name: Kapitulnik
citation:
ama: Alpichshev Z, Biswas R, Balatsky A, et al. STM imaging of impurity resonances
on Bi 2Se 3. Physical Review Letters. 2012;108(20). doi:10.1103/PhysRevLett.108.206402
apa: Alpichshev, Z., Biswas, R., Balatsky, A., Analytis, J., Chu, J., Fisher, I.,
& Kapitulnik, A. (2012). STM imaging of impurity resonances on Bi 2Se 3. Physical
Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.108.206402
chicago: Alpichshev, Zhanybek, Rudro Biswas, Alexander Balatsky, James Analytis,
Jiunhaw Chu, Ian Fisher, and Aharon Kapitulnik. “STM Imaging of Impurity Resonances
on Bi 2Se 3.” Physical Review Letters. American Physical Society, 2012.
https://doi.org/10.1103/PhysRevLett.108.206402.
ieee: Z. Alpichshev et al., “STM imaging of impurity resonances on Bi 2Se
3,” Physical Review Letters, vol. 108, no. 20. American Physical Society,
2012.
ista: Alpichshev Z, Biswas R, Balatsky A, Analytis J, Chu J, Fisher I, Kapitulnik
A. 2012. STM imaging of impurity resonances on Bi 2Se 3. Physical Review Letters.
108(20).
mla: Alpichshev, Zhanybek, et al. “STM Imaging of Impurity Resonances on Bi 2Se
3.” Physical Review Letters, vol. 108, no. 20, American Physical Society,
2012, doi:10.1103/PhysRevLett.108.206402.
short: Z. Alpichshev, R. Biswas, A. Balatsky, J. Analytis, J. Chu, I. Fisher, A.
Kapitulnik, Physical Review Letters 108 (2012).
date_created: 2018-12-11T11:46:11Z
date_published: 2012-01-01T00:00:00Z
date_updated: 2021-01-12T07:52:49Z
day: '01'
doi: 10.1103/PhysRevLett.108.206402
extern: '1'
intvolume: ' 108'
issue: '20'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1108.0022
month: '01'
oa: 1
oa_version: None
publication: Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '7442'
status: public
title: STM imaging of impurity resonances on Bi 2Se 3
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 108
year: '2012'
...
---
_id: '1725'
abstract:
- lang: eng
text: The spatial organization of cell fates during development involves the interpretation
of morphogen gradients by cellular signaling cascades and transcriptional networks.
Recent studies use biophysical models, genetics, and quantitative imaging to unravel
how tissue-level morphogen behavior arises from subcellular events. Moreover,
data from several systems show that morphogen gradients, downstream signaling,
and the activity of cell-intrinsic transcriptional networks change dynamically
during pattern formation. Studies from Drosophila and now also vertebrates suggest
that transcriptional network dynamics are central to the generation of gene expression
patterns. Together, this leads to the view that pattern formation is an emergent
behavior that results from the coordination of events occurring across molecular,
cellular, and tissue scales. The development of novel approaches to study this
complex process remains a challenge.
acknowledgement: 'Funding provided by the Medical Research Council (UK). '
author:
- first_name: Anna
full_name: Anna Kicheva
id: 3959A2A0-F248-11E8-B48F-1D18A9856A87
last_name: Kicheva
orcid: 0000-0003-4509-4998
- first_name: Michael
full_name: Cohen, Michael H
last_name: Cohen
- first_name: James
full_name: Briscoe, James
last_name: Briscoe
citation:
ama: 'Kicheva A, Cohen M, Briscoe J. Developmental pattern formation: Insights from
physics and biology. Science. 2012;338(6104):210-212. doi:10.1126/science.1225182'
apa: 'Kicheva, A., Cohen, M., & Briscoe, J. (2012). Developmental pattern formation:
Insights from physics and biology. Science. American Association for the
Advancement of Science. https://doi.org/10.1126/science.1225182'
chicago: 'Kicheva, Anna, Michael Cohen, and James Briscoe. “Developmental Pattern
Formation: Insights from Physics and Biology.” Science. American Association
for the Advancement of Science, 2012. https://doi.org/10.1126/science.1225182.'
ieee: 'A. Kicheva, M. Cohen, and J. Briscoe, “Developmental pattern formation: Insights
from physics and biology,” Science, vol. 338, no. 6104. American Association
for the Advancement of Science, pp. 210–212, 2012.'
ista: 'Kicheva A, Cohen M, Briscoe J. 2012. Developmental pattern formation: Insights
from physics and biology. Science. 338(6104), 210–212.'
mla: 'Kicheva, Anna, et al. “Developmental Pattern Formation: Insights from Physics
and Biology.” Science, vol. 338, no. 6104, American Association for the
Advancement of Science, 2012, pp. 210–12, doi:10.1126/science.1225182.'
short: A. Kicheva, M. Cohen, J. Briscoe, Science 338 (2012) 210–212.
date_created: 2018-12-11T11:53:40Z
date_published: 2012-10-12T00:00:00Z
date_updated: 2021-01-12T06:52:47Z
day: '12'
doi: 10.1126/science.1225182
extern: 1
intvolume: ' 338'
issue: '6104'
month: '10'
page: 210 - 212
publication: Science
publication_status: published
publisher: American Association for the Advancement of Science
publist_id: '5404'
quality_controlled: 0
status: public
title: 'Developmental pattern formation: Insights from physics and biology'
type: journal_article
volume: 338
year: '2012'
...
---
_id: '1756'
abstract:
- lang: eng
text: We report on the electronic transport properties of multiple-gate devices
fabricated from undoped silicon nanowires. Understanding and control of the relevant
transport mechanisms was achieved by means of local electrostatic gating and temperature-dependent
measurements. The roles of the source/drain contacts and of the silicon channel
could be independently evaluated and tuned. Wrap gates surrounding the silicide-silicon
contact interfaces were proved to be effective in inducing a full suppression
of the contact Schottky barriers, thereby enabling carrier injection down to liquid
helium temperature. By independently tuning the effective Schottky barrier heights,
a variety of reconfigurable device functionalities could be obtained. In particular,
the same nanowire device could be configured to work as a Schottky barrier transistor,
a Schottky diode, or a p-n diode with tunable polarities. This versatility was
eventually exploited to realize a NAND logic gate with gain well above one.
acknowledgement: This work was supported by the Agence Nationale de la Recherche (ANR)
through the ACCESS and COHESION projects and by the European Commission through
the Chemtronics program MEST-CT-2005-020513
author:
- first_name: Massimo
full_name: Mongillo, Massimo
last_name: Mongillo
- first_name: Panayotis
full_name: Spathis, Panayotis N
last_name: Spathis
- first_name: Georgios
full_name: Georgios Katsaros
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
- first_name: Pascal
full_name: Gentile, Pascal
last_name: Gentile
- first_name: Silvano
full_name: De Franceschi, Silvano
last_name: De Franceschi
citation:
ama: Mongillo M, Spathis P, Katsaros G, Gentile P, De Franceschi S. Multifunctional
devices and logic gates with undoped silicon nanowires. Nano Letters. 2012;12(6):3074-3079.
doi:10.1021/nl300930m
apa: Mongillo, M., Spathis, P., Katsaros, G., Gentile, P., & De Franceschi,
S. (2012). Multifunctional devices and logic gates with undoped silicon nanowires.
Nano Letters. American Chemical Society. https://doi.org/10.1021/nl300930m
chicago: Mongillo, Massimo, Panayotis Spathis, Georgios Katsaros, Pascal Gentile,
and Silvano De Franceschi. “Multifunctional Devices and Logic Gates with Undoped
Silicon Nanowires.” Nano Letters. American Chemical Society, 2012. https://doi.org/10.1021/nl300930m.
ieee: M. Mongillo, P. Spathis, G. Katsaros, P. Gentile, and S. De Franceschi, “Multifunctional
devices and logic gates with undoped silicon nanowires,” Nano Letters,
vol. 12, no. 6. American Chemical Society, pp. 3074–3079, 2012.
ista: Mongillo M, Spathis P, Katsaros G, Gentile P, De Franceschi S. 2012. Multifunctional
devices and logic gates with undoped silicon nanowires. Nano Letters. 12(6), 3074–3079.
mla: Mongillo, Massimo, et al. “Multifunctional Devices and Logic Gates with Undoped
Silicon Nanowires.” Nano Letters, vol. 12, no. 6, American Chemical Society,
2012, pp. 3074–79, doi:10.1021/nl300930m.
short: M. Mongillo, P. Spathis, G. Katsaros, P. Gentile, S. De Franceschi, Nano
Letters 12 (2012) 3074–3079.
date_created: 2018-12-11T11:53:50Z
date_published: 2012-06-13T00:00:00Z
date_updated: 2021-01-12T06:53:00Z
day: '13'
doi: 10.1021/nl300930m
extern: 1
intvolume: ' 12'
issue: '6'
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1208.1465
month: '06'
oa: 1
page: 3074 - 3079
publication: Nano Letters
publication_status: published
publisher: American Chemical Society
publist_id: '5368'
quality_controlled: 0
status: public
title: Multifunctional devices and logic gates with undoped silicon nanowires
type: journal_article
volume: 12
year: '2012'
...
---
_id: '1757'
abstract:
- lang: eng
text: Self-assembled Ge wires with a height of only 3 unit cells and a length of
up to 2 micrometers were grown on Si(001) by means of a catalyst-free method based
on molecular beam epitaxy. The wires grow horizontally along either the [100]
or the [010] direction. On atomically flat surfaces, they exhibit a highly uniform,
triangular cross section. A simple thermodynamic model accounts for the existence
of a preferential base width for longitudinal expansion, in quantitative agreement
with the experimental findings. Despite the absence of intentional doping, the
first transistor-type devices made from single wires show low-resistive electrical
contacts and single-hole transport at sub-Kelvin temperatures. In view of their
exceptionally small and self-defined cross section, these Ge wires hold promise
for the realization of hole systems with exotic properties and provide a new development
route for silicon-based nanoelectronics.
acknowledgement: We acknowledge the financial support by the DFG SPP1386, P. Chen
and D. J. Thurmer for MBE assistance, R. Wacquez for providing the ultrathin SOI
wafers, and G. Bauer, Y. Hu, X. Jehl, S. Kiravittaya, C. Klöffel, E. J. H. Lee,
F. Liu, D. Loss, and S. Mahapatra for helpful discussions. G. K. acknowledges support
from the European commission via a Marie Curie Carrer Integration Grant. S. D. F.
acknowledges support from the European Research Council through the starting grant
program
author:
- first_name: Jianjun
full_name: Zhang, Jianjun
last_name: Zhang
- first_name: Georgios
full_name: Georgios Katsaros
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
- first_name: Francesco
full_name: Montalenti, Francesco
last_name: Montalenti
- first_name: Daniele
full_name: Scopece, Daniele
last_name: Scopece
- first_name: Roman
full_name: Rezaev, Roman O
last_name: Rezaev
- first_name: Christine
full_name: Mickel, Christine H
last_name: Mickel
- first_name: Bernd
full_name: Rellinghaus, Bernd
last_name: Rellinghaus
- first_name: Leo
full_name: Miglio, Leo P
last_name: Miglio
- first_name: Silvano
full_name: De Franceschi, Silvano
last_name: De Franceschi
- first_name: Armando
full_name: Rastelli, Armando
last_name: Rastelli
- first_name: Oliver
full_name: Schmidt, Oliver G
last_name: Schmidt
citation:
ama: Zhang J, Katsaros G, Montalenti F, et al. Monolithic growth of ultrathin Ge
nanowires on Si(001) . Physical Review Letters. 2012;109(8). doi:10.1103/PhysRevLett.109.085502
apa: Zhang, J., Katsaros, G., Montalenti, F., Scopece, D., Rezaev, R., Mickel, C.,
… Schmidt, O. (2012). Monolithic growth of ultrathin Ge nanowires on Si(001) .
Physical Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.109.085502
chicago: Zhang, Jianjun, Georgios Katsaros, Francesco Montalenti, Daniele Scopece,
Roman Rezaev, Christine Mickel, Bernd Rellinghaus, et al. “Monolithic Growth of
Ultrathin Ge Nanowires on Si(001) .” Physical Review Letters. American
Physical Society, 2012. https://doi.org/10.1103/PhysRevLett.109.085502.
ieee: J. Zhang et al., “Monolithic growth of ultrathin Ge nanowires on Si(001)
,” Physical Review Letters, vol. 109, no. 8. American Physical Society,
2012.
ista: Zhang J, Katsaros G, Montalenti F, Scopece D, Rezaev R, Mickel C, Rellinghaus
B, Miglio L, De Franceschi S, Rastelli A, Schmidt O. 2012. Monolithic growth of
ultrathin Ge nanowires on Si(001) . Physical Review Letters. 109(8).
mla: Zhang, Jianjun, et al. “Monolithic Growth of Ultrathin Ge Nanowires on Si(001)
.” Physical Review Letters, vol. 109, no. 8, American Physical Society,
2012, doi:10.1103/PhysRevLett.109.085502.
short: J. Zhang, G. Katsaros, F. Montalenti, D. Scopece, R. Rezaev, C. Mickel, B.
Rellinghaus, L. Miglio, S. De Franceschi, A. Rastelli, O. Schmidt, Physical Review
Letters 109 (2012).
date_created: 2018-12-11T11:53:51Z
date_published: 2012-08-23T00:00:00Z
date_updated: 2021-01-12T06:53:00Z
day: '23'
doi: 10.1103/PhysRevLett.109.085502
extern: 1
intvolume: ' 109'
issue: '8'
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1208.0666
month: '08'
oa: 1
publication: Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '5367'
quality_controlled: 0
status: public
title: 'Monolithic growth of ultrathin Ge nanowires on Si(001) '
type: journal_article
volume: 109
year: '2012'
...
---
_id: '1758'
abstract:
- lang: eng
text: We studied the low-energy states of spin-1/2 quantum dots defined in InAs/InP
nanowires and coupled to aluminum superconducting leads. By varying the superconducting
gap Δ with a magnetic field B we investigated the transition from strong coupling
Δ≪T K to weak-coupling Δ≫T K, where T K is the Kondo temperature. Below the critical
field, we observe a persisting zero-bias Kondo resonance that vanishes only for
low B or higher temperatures, leaving the room to more robust subgap structures
at bias voltages between Δ and 2Δ. For strong and approximately symmetric tunnel
couplings, a Josephson supercurrent is observed in addition to the Kondo peak.
We ascribe the coexistence of a Kondo resonance and a superconducting gap to a
significant density of intragap quasiparticle states, and the finite-bias subgap
structures to tunneling through Shiba states. Our results, supported by numerical
calculations, own relevance also in relation to tunnel-spectroscopy experiments
aiming at the observation of Majorana fermions in hybrid nanostructures.
acknowledgement: This work was supported by the EU Marie Curie program and by the
Agence Nationale de la Recherche. R. A. acknowledges support from the Spanish Ministry
of Science and Innovation through Grant No. FIS2009-08744
author:
- first_name: Eduardo
full_name: Lee, Eduardo J
last_name: Lee
- first_name: Xiaocheng
full_name: Jiang, Xiaocheng
last_name: Jiang
- first_name: Ramón
full_name: Aguado, Ramón
last_name: Aguado
- first_name: Georgios
full_name: Georgios Katsaros
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
- first_name: Charles
full_name: Lieber, Charles M
last_name: Lieber
- first_name: Silvano
full_name: De Franceschi, Silvano
last_name: De Franceschi
citation:
ama: Lee E, Jiang X, Aguado R, Katsaros G, Lieber C, De Franceschi S. Zero-bias
anomaly in a nanowire quantum dot coupled to superconductors. Physical Review
Letters. 2012;109(18). doi:10.1103/PhysRevLett.109.186802
apa: Lee, E., Jiang, X., Aguado, R., Katsaros, G., Lieber, C., & De Franceschi,
S. (2012). Zero-bias anomaly in a nanowire quantum dot coupled to superconductors.
Physical Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.109.186802
chicago: Lee, Eduardo, Xiaocheng Jiang, Ramón Aguado, Georgios Katsaros, Charles
Lieber, and Silvano De Franceschi. “Zero-Bias Anomaly in a Nanowire Quantum Dot
Coupled to Superconductors.” Physical Review Letters. American Physical
Society, 2012. https://doi.org/10.1103/PhysRevLett.109.186802.
ieee: E. Lee, X. Jiang, R. Aguado, G. Katsaros, C. Lieber, and S. De Franceschi,
“Zero-bias anomaly in a nanowire quantum dot coupled to superconductors,” Physical
Review Letters, vol. 109, no. 18. American Physical Society, 2012.
ista: Lee E, Jiang X, Aguado R, Katsaros G, Lieber C, De Franceschi S. 2012. Zero-bias
anomaly in a nanowire quantum dot coupled to superconductors. Physical Review
Letters. 109(18).
mla: Lee, Eduardo, et al. “Zero-Bias Anomaly in a Nanowire Quantum Dot Coupled to
Superconductors.” Physical Review Letters, vol. 109, no. 18, American Physical
Society, 2012, doi:10.1103/PhysRevLett.109.186802.
short: E. Lee, X. Jiang, R. Aguado, G. Katsaros, C. Lieber, S. De Franceschi, Physical
Review Letters 109 (2012).
date_created: 2018-12-11T11:53:51Z
date_published: 2012-10-31T00:00:00Z
date_updated: 2021-01-12T06:53:01Z
day: '31'
doi: 10.1103/PhysRevLett.109.186802
extern: 1
intvolume: ' 109'
issue: '18'
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1207.1259
month: '10'
oa: 1
publication: Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '5366'
quality_controlled: 0
status: public
title: Zero-bias anomaly in a nanowire quantum dot coupled to superconductors
type: journal_article
volume: 109
year: '2012'
...
---
_id: '17613'
abstract:
- lang: eng
text: We study the interaction of a supermassive black hole (SMBH) binary and a
standard radiatively efficient thin accretion disk. We examine steady-state configurations
of the disk and migrating SMBH system, self-consistently accounting for tidal
and viscous torques and heating, radiative diffusion limited cooling, gas and
radiation pressure, and the decay of the binary's orbit. We obtain a "phase diagram"
of the system as a function of binary parameters, showing regimes in which both
the disk structure and migration have a different character. Although massive
binaries can create a central gap in the disk at large radii, the tidal barrier
of the secondary causes a significant pile-up of gas outside of its orbit, which
can lead to the closing of the gap. We find that this spillover occurs at an orbital
separation as large as ~200 M_7^{-1/2} gravitational radii, where M = 10^7 M_7
Msun is the total binary mass. If the secondary is less massive than ~10^6 Msun,
then the gap is closed before gravitational waves (GWs) start dominating the orbital
decay. In this regime, the disk is still strongly perturbed, but the piled-up
gas continuously overflows as in a porous dam, and crosses inside the secondary's
orbit. The corresponding migration rate, which we label Type 1.5, is slower than
the usual limiting cases known as Type I and II migration. Compared to an unperturbed
disk, the steady-state disk in the overflowing regime is up to several hundred
times brighter in the optical bands. Surveys such as PanSTARRS or LSST may discover
the periodic variability of this population of binaries. Our results imply that
the circumbinary disks around SMBHs can extend to small radii during the last
stages of their merger, when they are detectable by LISA, and may produce coincident
electromagnetic (EM) emission similar to active galactic nuclei (AGN).
alternative_title:
- 'Overflow and migration: SMBH binaries'
article_processing_charge: No
article_type: original
author:
- first_name: Bence
full_name: Kocsis, Bence
last_name: Kocsis
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Abraham
full_name: Loeb, Abraham
last_name: Loeb
citation:
ama: 'Kocsis B, Haiman Z, Loeb A. Gas pile-up, gap overflow and Type 1.5 migration
in circumbinary discs: Application to supermassive black hole binaries. Monthly
Notices of the Royal Astronomical Society. 2012;427(3):2680-2700. doi:10.1111/j.1365-2966.2012.22118.x'
apa: 'Kocsis, B., Haiman, Z., & Loeb, A. (2012). Gas pile-up, gap overflow and
Type 1.5 migration in circumbinary discs: Application to supermassive black hole
binaries. Monthly Notices of the Royal Astronomical Society. Oxford University
Press. https://doi.org/10.1111/j.1365-2966.2012.22118.x'
chicago: 'Kocsis, Bence, Zoltán Haiman, and Abraham Loeb. “Gas Pile-up, Gap Overflow
and Type 1.5 Migration in Circumbinary Discs: Application to Supermassive Black
Hole Binaries.” Monthly Notices of the Royal Astronomical Society. Oxford
University Press, 2012. https://doi.org/10.1111/j.1365-2966.2012.22118.x.'
ieee: 'B. Kocsis, Z. Haiman, and A. Loeb, “Gas pile-up, gap overflow and Type 1.5
migration in circumbinary discs: Application to supermassive black hole binaries,”
Monthly Notices of the Royal Astronomical Society, vol. 427, no. 3. Oxford
University Press, pp. 2680–2700, 2012.'
ista: 'Kocsis B, Haiman Z, Loeb A. 2012. Gas pile-up, gap overflow and Type 1.5
migration in circumbinary discs: Application to supermassive black hole binaries.
Monthly Notices of the Royal Astronomical Society. 427(3), 2680–2700.'
mla: 'Kocsis, Bence, et al. “Gas Pile-up, Gap Overflow and Type 1.5 Migration in
Circumbinary Discs: Application to Supermassive Black Hole Binaries.” Monthly
Notices of the Royal Astronomical Society, vol. 427, no. 3, Oxford University
Press, 2012, pp. 2680–700, doi:10.1111/j.1365-2966.2012.22118.x.'
short: B. Kocsis, Z. Haiman, A. Loeb, Monthly Notices of the Royal Astronomical
Society 427 (2012) 2680–2700.
date_created: 2024-09-05T13:28:17Z
date_published: 2012-12-11T00:00:00Z
date_updated: 2024-09-24T07:40:02Z
day: '11'
doi: 10.1111/j.1365-2966.2012.22118.x
extern: '1'
intvolume: ' 427'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1111/j.1365-2966.2012.22118.x
month: '12'
oa: 1
oa_version: Published Version
page: 2680-2700
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Gas pile-up, gap overflow and Type 1.5 migration in circumbinary discs: Application
to supermassive black hole binaries'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 427
year: '2012'
...
---
_id: '17636'
abstract:
- lang: eng
text: It is commonly believed that the earliest stages of star formation in the
Universe were self-regulated by global radiation backgrounds - either by the ultraviolet
(UV) Lyman-Werner (LW) photons emitted by the first stars (directly photodissociating
H2), or by the X-rays produced by accretion on to the black hole (BH) remnants
of these stars (heating the gas but catalysing H2 formation). Recent studies have
suggested that a significant fraction of the first stars may have had low masses
(a few M⊙). Such stars do not leave BH remnants and they have softer spectra,
with copious infrared (IR) radiation at photon energies ∼1 eV. Similar to LW and
X-ray photons, these photons have a mean-free path comparable to the Hubble distance,
building up an early IR background. Here we show that if soft-spectrum stars,
with masses of a few M⊙, contributed ≳0.3 per cent of the UV background (or their
mass fraction exceeded ∼80 per cent), then their IR radiation dominated radiative
feedback in the early Universe. The feedback is different from the UV feedback
from high-mass stars, and occurs through the photodetachment of H− ions, necessary
for efficient H2 formation. Nevertheless, we find that the baryon fraction which
must be incorporated into low-mass stars in order to suppress H2 cooling is only
a factor of a few higher than for high-mass stars.
article_processing_charge: No
article_type: original
author:
- first_name: J.
full_name: Wolcott-Green, J.
last_name: Wolcott-Green
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: 'Wolcott-Green J, Haiman Z. Feedback from the infrared background in the early
universe. Monthly Notices of the Royal Astronomical Society: Letters. 2012;425(1):L51-L55.
doi:10.1111/j.1745-3933.2012.01298.x'
apa: 'Wolcott-Green, J., & Haiman, Z. (2012). Feedback from the infrared background
in the early universe. Monthly Notices of the Royal Astronomical Society: Letters.
Oxford University Press. https://doi.org/10.1111/j.1745-3933.2012.01298.x'
chicago: 'Wolcott-Green, J., and Zoltán Haiman. “Feedback from the Infrared Background
in the Early Universe.” Monthly Notices of the Royal Astronomical Society:
Letters. Oxford University Press, 2012. https://doi.org/10.1111/j.1745-3933.2012.01298.x.'
ieee: 'J. Wolcott-Green and Z. Haiman, “Feedback from the infrared background in
the early universe,” Monthly Notices of the Royal Astronomical Society: Letters,
vol. 425, no. 1. Oxford University Press, pp. L51–L55, 2012.'
ista: 'Wolcott-Green J, Haiman Z. 2012. Feedback from the infrared background in
the early universe. Monthly Notices of the Royal Astronomical Society: Letters.
425(1), L51–L55.'
mla: 'Wolcott-Green, J., and Zoltán Haiman. “Feedback from the Infrared Background
in the Early Universe.” Monthly Notices of the Royal Astronomical Society:
Letters, vol. 425, no. 1, Oxford University Press, 2012, pp. L51–55, doi:10.1111/j.1745-3933.2012.01298.x.'
short: 'J. Wolcott-Green, Z. Haiman, Monthly Notices of the Royal Astronomical Society:
Letters 425 (2012) L51–L55.'
date_created: 2024-09-06T07:07:07Z
date_published: 2012-09-01T00:00:00Z
date_updated: 2024-09-24T11:29:36Z
day: '01'
doi: 10.1111/j.1745-3933.2012.01298.x
extern: '1'
intvolume: ' 425'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1111/j.1745-3933.2012.01298.x
month: '09'
oa: 1
oa_version: Published Version
page: L51-L55
publication: 'Monthly Notices of the Royal Astronomical Society: Letters'
publication_identifier:
issn:
- 1745-3925
- 1745-3933
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Feedback from the infrared background in the early universe
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 425
year: '2012'
...
---
_id: '17651'
abstract:
- lang: eng
text: 'A decade after their first discovery, the origin of giant supermassive black
holes (SMBHs), with masses in excess of 109 Msolar, at redshifts as early as z
> 6, remains a puzzle. One possibility is that stellar-mass ``seed'''' BHs, left
behind by the first stars, accrete gas at close to the Eddington limit during
a large fraction (>~ 50%) of the time. While maintaining such a high accretion
rate may itself be difficult, here we focus on another, less commonly discussed
problem in this scenario: unless BH seed formation and growth are preferentially
suppressed in less massive protogalaxies, the mass density in M~106Msolar SMBHs
at z ~ 6 already exceeds the locally observed SMBH mass density by several orders
of magnitude. We show that the X-rays from the earliest accreting BHs themselves
can cause a self-regulation, by partially ionizing and heating the intergalactic
medium (IGM). This ``global warming'''' suppresses the formation and growth of
subsequent generations of BHs in low-mass halos, and can produce excellent agreement
with recent estimates of the z = 6 SMBH mass function, without impeding the growth
of the largest (M>~109Msolar) holes, which reside in the most massive galaxies
that formed first. The proposed gravitational-wave observatory eLISA could detect
several tens of major mergers between SMBHs at z > 6.'
article_processing_charge: No
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Takamitsu
full_name: Tanaka, Takamitsu
last_name: Tanaka
- first_name: Rosalba
full_name: Perna, Rosalba
last_name: Perna
citation:
ama: 'Haiman Z, Tanaka T, Perna R. Self-regulating the early growth of black holes
through global warming. In: AIP Conference Proceedings. Vol 1480. American
Institute of Physics; 2012:303-308. doi:10.1063/1.4754372'
apa: 'Haiman, Z., Tanaka, T., & Perna, R. (2012). Self-regulating the early
growth of black holes through global warming. In AIP Conference Proceedings
(Vol. 1480, pp. 303–308). Kyoto, Japan: American Institute of Physics. https://doi.org/10.1063/1.4754372'
chicago: Haiman, Zoltán, Takamitsu Tanaka, and Rosalba Perna. “Self-Regulating the
Early Growth of Black Holes through Global Warming.” In AIP Conference Proceedings,
1480:303–8. American Institute of Physics, 2012. https://doi.org/10.1063/1.4754372.
ieee: Z. Haiman, T. Tanaka, and R. Perna, “Self-regulating the early growth of black
holes through global warming,” in AIP Conference Proceedings, Kyoto, Japan,
2012, vol. 1480, pp. 303–308.
ista: Haiman Z, Tanaka T, Perna R. 2012. Self-regulating the early growth of black
holes through global warming. AIP Conference Proceedings. FIRST STARS IV - From
Hayashi to the Future vol. 1480, 303–308.
mla: Haiman, Zoltán, et al. “Self-Regulating the Early Growth of Black Holes through
Global Warming.” AIP Conference Proceedings, vol. 1480, American Institute
of Physics, 2012, pp. 303–08, doi:10.1063/1.4754372.
short: Z. Haiman, T. Tanaka, R. Perna, in:, AIP Conference Proceedings, American
Institute of Physics, 2012, pp. 303–308.
conference:
end_date: 2012-05-25
location: Kyoto, Japan
name: FIRST STARS IV - From Hayashi to the Future
start_date: 2012-05-21
date_created: 2024-09-06T07:29:59Z
date_published: 2012-09-12T00:00:00Z
date_updated: 2024-09-24T13:16:41Z
day: '12'
doi: 10.1063/1.4754372
extern: '1'
intvolume: ' 1480'
language:
- iso: eng
main_file_link:
- url: https://doi.org/10.1063/1.4754372
month: '09'
oa_version: None
page: 303-308
publication: AIP Conference Proceedings
publication_identifier:
issn:
- 0094-243X
publication_status: published
publisher: American Institute of Physics
quality_controlled: '1'
scopus_import: '1'
status: public
title: Self-regulating the early growth of black holes through global warming
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 1480
year: '2012'
...
---
_id: '17660'
abstract:
- lang: eng
text: Many astrophysical binaries, from planets to black holes, exert strong torques
on their circumbinary accretion discs, and are expected to significantly modify
the disc structure. Despite the several decade long history of the subject, the
joint evolution of the binary + disc system has not been modelled with self-consistent
assumptions for arbitrary mass ratios and accretion rates. Here, we solve the
coupled binary–disc evolution equations analytically in the strongly perturbed
limit, treating the azimuthally averaged angular momentum exchange between the
disc and the binary and the modifications to the density, scaleheight, and viscosity
self-consistently, including viscous and tidal heating, diffusion limited cooling,
radiation pressure and the orbital decay of the binary. We find a solution with
a central cavity and a migration rate similar to those previously obtained for
Type II migration, applicable for large masses and binary separations, and near-equal
mass ratios. However, we identify a distinct new regime, applicable at smaller
separations and masses, and mass ratio in the range 10−3 ≲ q ≲ 0.1. For these
systems, gas piles up outside the binary's orbit, but rather than creating a cavity,
it continuously overflows as in a porous dam. The disc profile is intermediate
between a weakly perturbed disc (producing Type I migration) and a disc with a
gap (with Type II migration). However, the migration rate of the secondary is
typically slower than both Type I and Type II rates. We term this new regime ‘Type
1.5’ migration.
alternative_title:
- 'Overflow and migration: general theory'
article_processing_charge: No
article_type: original
author:
- first_name: Bence
full_name: Kocsis, Bence
last_name: Kocsis
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Abraham
full_name: Loeb, Abraham
last_name: Loeb
citation:
ama: 'Kocsis B, Haiman Z, Loeb A. Gas pile-up, gap overflow and Type 1.5 migration
in circumbinary discs: General theory. Monthly Notices of the Royal Astronomical
Society. 2012;427(3):2660-2679. doi:10.1111/j.1365-2966.2012.22129.x'
apa: 'Kocsis, B., Haiman, Z., & Loeb, A. (2012). Gas pile-up, gap overflow and
Type 1.5 migration in circumbinary discs: General theory. Monthly Notices of
the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1111/j.1365-2966.2012.22129.x'
chicago: 'Kocsis, Bence, Zoltán Haiman, and Abraham Loeb. “Gas Pile-up, Gap Overflow
and Type 1.5 Migration in Circumbinary Discs: General Theory.” Monthly Notices
of the Royal Astronomical Society. Oxford University Press, 2012. https://doi.org/10.1111/j.1365-2966.2012.22129.x.'
ieee: 'B. Kocsis, Z. Haiman, and A. Loeb, “Gas pile-up, gap overflow and Type 1.5
migration in circumbinary discs: General theory,” Monthly Notices of the Royal
Astronomical Society, vol. 427, no. 3. Oxford University Press, pp. 2660–2679,
2012.'
ista: 'Kocsis B, Haiman Z, Loeb A. 2012. Gas pile-up, gap overflow and Type 1.5
migration in circumbinary discs: General theory. Monthly Notices of the Royal
Astronomical Society. 427(3), 2660–2679.'
mla: 'Kocsis, Bence, et al. “Gas Pile-up, Gap Overflow and Type 1.5 Migration in
Circumbinary Discs: General Theory.” Monthly Notices of the Royal Astronomical
Society, vol. 427, no. 3, Oxford University Press, 2012, pp. 2660–79, doi:10.1111/j.1365-2966.2012.22129.x.'
short: B. Kocsis, Z. Haiman, A. Loeb, Monthly Notices of the Royal Astronomical
Society 427 (2012) 2660–2679.
date_created: 2024-09-06T07:38:16Z
date_published: 2012-12-11T00:00:00Z
date_updated: 2024-09-25T07:21:05Z
day: '11'
doi: 10.1111/j.1365-2966.2012.22129.x
extern: '1'
intvolume: ' 427'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1111/j.1365-2966.2012.22129.x
month: '12'
oa: 1
oa_version: Published Version
page: 2660-2679
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Gas pile-up, gap overflow and Type 1.5 migration in circumbinary discs: General
theory'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 427
year: '2012'
...
---
_id: '17674'
abstract:
- lang: eng
text: The power spectrum of cosmic infrared background (CIB) anisotropies is sensitive
to the connection between star formation and dark matter haloes over the entire
cosmic star formation history. Here we develop a model that associates star‐forming
galaxies with dark matter haloes and their subhaloes. The model is based on a
parametrized relation between the dust‐processed infrared luminosity and (sub)halo
mass. By adjusting three free parameters, we attempt to simultaneously fit the
four frequency bands of the Planck measurement of the CIB anisotropy power spectrum.
To fit the data, we find that the star formation efficiency must peak on a halo
mass scale of ≈5 × 10^12 M⊙ and the infrared luminosity per unit mass must increase
rapidly with redshift. By comparing our predictions with a well‐calibrated phenomenological
model for shot noise, and with a direct observation of source counts, we show
that the mean duty cycle of the underlying infrared sources must be near unity,
indicating that the CIB is dominated by long‐lived quiescent star formation, rather
than intermittent short ‘starbursts’. Despite the improved flexibility of our
model, the best simultaneous fit to all four Planck channels remains relatively
poor. We discuss possible further extensions to alleviate the remaining tension
with the data. Our model presents a theoretical framework for a future joint analysis
of both background anisotropy and source count measurements.
alternative_title:
- Improved models for CIB anisotropies
article_processing_charge: No
article_type: original
author:
- first_name: Cien
full_name: Shang, Cien
last_name: Shang
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Lloyd
full_name: Knox, Lloyd
last_name: Knox
- first_name: S. Peng
full_name: Oh, S. Peng
last_name: Oh
citation:
ama: 'Shang C, Haiman Z, Knox L, Oh SP. Improved models for cosmic infrared background
anisotropies: New constraints on the infrared galaxy population. Monthly Notices
of the Royal Astronomical Society. 2012;421(4):2832-2845. doi:10.1111/j.1365-2966.2012.20510.x'
apa: 'Shang, C., Haiman, Z., Knox, L., & Oh, S. P. (2012). Improved models for
cosmic infrared background anisotropies: New constraints on the infrared galaxy
population. Monthly Notices of the Royal Astronomical Society. Oxford University
Press. https://doi.org/10.1111/j.1365-2966.2012.20510.x'
chicago: 'Shang, Cien, Zoltán Haiman, Lloyd Knox, and S. Peng Oh. “Improved Models
for Cosmic Infrared Background Anisotropies: New Constraints on the Infrared Galaxy
Population.” Monthly Notices of the Royal Astronomical Society. Oxford
University Press, 2012. https://doi.org/10.1111/j.1365-2966.2012.20510.x.'
ieee: 'C. Shang, Z. Haiman, L. Knox, and S. P. Oh, “Improved models for cosmic infrared
background anisotropies: New constraints on the infrared galaxy population,” Monthly
Notices of the Royal Astronomical Society, vol. 421, no. 4. Oxford University
Press, pp. 2832–2845, 2012.'
ista: 'Shang C, Haiman Z, Knox L, Oh SP. 2012. Improved models for cosmic infrared
background anisotropies: New constraints on the infrared galaxy population. Monthly
Notices of the Royal Astronomical Society. 421(4), 2832–2845.'
mla: 'Shang, Cien, et al. “Improved Models for Cosmic Infrared Background Anisotropies:
New Constraints on the Infrared Galaxy Population.” Monthly Notices of the
Royal Astronomical Society, vol. 421, no. 4, Oxford University Press, 2012,
pp. 2832–45, doi:10.1111/j.1365-2966.2012.20510.x.'
short: C. Shang, Z. Haiman, L. Knox, S.P. Oh, Monthly Notices of the Royal Astronomical
Society 421 (2012) 2832–2845.
date_created: 2024-09-06T07:50:37Z
date_published: 2012-04-10T00:00:00Z
date_updated: 2024-09-25T08:36:17Z
day: '10'
doi: 10.1111/j.1365-2966.2012.20510.x
extern: '1'
intvolume: ' 421'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1111/j.1365-2966.2012.20510.x
month: '04'
oa: 1
oa_version: Published Version
page: 2832-2845
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Improved models for cosmic infrared background anisotropies: New constraints
on the infrared galaxy population'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 421
year: '2012'
...
---
_id: '17675'
abstract:
- lang: eng
text: In this paper, we show that Minkowski Functionals (MFs) of weak gravitational
lensing (WL) convergence maps contain significant non-Gaussian, cosmology-dependent
information. To do this, we use a large suite of cosmological ray-tracing N-body
simulations to create mock WL convergence maps, and study the cosmological information
content of MFs derived from these maps. Our suite consists of 80 independent 512^3
N-body runs, covering seven different cosmologies, varying three cosmological
parameters Omega_m, w, and sigma_8 one at a time, around a fiducial LambdaCDM
model. In each cosmology, we use ray-tracing to create a thousand pseudo-independent
12 deg^2 convergence maps, and use these in a Monte Carlo procedure to estimate
the joint confidence contours on the above three parameters. We include redshift
tomography at three different source redshifts z_s=1, 1.5, 2, explore five different
smoothing scales theta_G=1, 2, 3, 5, 10 arcmin, and explicitly compare and combine
the MFs with the WL power spectrum. We find that the MFs capture a substantial
amount of information from non-Gaussian features of convergence maps, i.e. beyond
the power spectrum. The MFs are particularly well suited to break degeneracies
and to constrain the dark energy equation of state parameter w (by a factor of
~ three better than from the power spectrum alone). The non-Gaussian information
derives partly from the one-point function of the convergence (through V_0, the
"area" MF), and partly through non-linear spatial information (through combining
different smoothing scales for V_0, and through V_1 and V_2, the boundary length
and genus MFs, respectively). In contrast to the power spectrum, the best constraints
from the MFs are obtained only when multiple smoothing scales are combined.
article_number: '103513'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Jan M.
full_name: Kratochvil, Jan M.
last_name: Kratochvil
- first_name: Eugene A.
full_name: Lim, Eugene A.
last_name: Lim
- first_name: Sheng
full_name: Wang, Sheng
last_name: Wang
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Morgan
full_name: May, Morgan
last_name: May
- first_name: Kevin
full_name: Huffenberger, Kevin
last_name: Huffenberger
citation:
ama: Kratochvil JM, Lim EA, Wang S, Haiman Z, May M, Huffenberger K. Probing cosmology
with weak lensing Minkowski functionals. Physical Review D. 2012;85(10).
doi:10.1103/physrevd.85.103513
apa: Kratochvil, J. M., Lim, E. A., Wang, S., Haiman, Z., May, M., & Huffenberger,
K. (2012). Probing cosmology with weak lensing Minkowski functionals. Physical
Review D. American Physical Society. https://doi.org/10.1103/physrevd.85.103513
chicago: Kratochvil, Jan M., Eugene A. Lim, Sheng Wang, Zoltán Haiman, Morgan May,
and Kevin Huffenberger. “Probing Cosmology with Weak Lensing Minkowski Functionals.”
Physical Review D. American Physical Society, 2012. https://doi.org/10.1103/physrevd.85.103513.
ieee: J. M. Kratochvil, E. A. Lim, S. Wang, Z. Haiman, M. May, and K. Huffenberger,
“Probing cosmology with weak lensing Minkowski functionals,” Physical Review
D, vol. 85, no. 10. American Physical Society, 2012.
ista: Kratochvil JM, Lim EA, Wang S, Haiman Z, May M, Huffenberger K. 2012. Probing
cosmology with weak lensing Minkowski functionals. Physical Review D. 85(10),
103513.
mla: Kratochvil, Jan M., et al. “Probing Cosmology with Weak Lensing Minkowski Functionals.”
Physical Review D, vol. 85, no. 10, 103513, American Physical Society,
2012, doi:10.1103/physrevd.85.103513.
short: J.M. Kratochvil, E.A. Lim, S. Wang, Z. Haiman, M. May, K. Huffenberger, Physical
Review D 85 (2012).
date_created: 2024-09-06T07:51:45Z
date_published: 2012-04-10T00:00:00Z
date_updated: 2024-09-25T08:41:09Z
day: '10'
doi: 10.1103/physrevd.85.103513
extern: '1'
external_id:
arxiv:
- '1109.6334'
intvolume: ' 85'
issue: '10'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.1109.6334'
month: '04'
oa: 1
oa_version: Preprint
publication: Physical Review D
publication_identifier:
issn:
- 1550-7998
- 1550-2368
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Probing cosmology with weak lensing Minkowski functionals
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 85
year: '2012'
...
---
_id: '17678'
abstract:
- lang: eng
text: 'The spectra of several high-redshift (z>6) quasars have shown evidence for
a Gunn-Peterson (GP) damping wing, indicating a substantial mean neutral hydrogen
fraction (x_HI > 0.03) in the z ~ 6 intergalactic medium (IGM). However, previous
analyses assumed that the IGM was uniformly ionized outside of the quasar''s HII
region. Here we relax this assumption and model patchy reionization scenarios
for a range of IGM and quasar parameters. We quantify the impact of these differences
on the inferred x_HI, by fitting the spectra of three quasars: SDSS J1148+5251
(z=6.419), J1030+0524 (z=6.308), and J1623+3112 (z=6.247). We find that the best-fit
values of x_HI in the patchy models agree well with the uniform case. More importantly,
we confirm that the observed spectra favor the presence of a GP damping wing,
with peak likelihoods decreasing by factors of > few - 10 when the spectra are
modeled without a damping wing. We also find that the Ly alpha absorption spectra,
by themselves, cannot distinguish the damping wing in a relatively neutral IGM
from a damping wing in a highly ionized IGM, caused either by an isolated neutral
patch, or by a damped Ly alpha absorber (DLA). However, neutral patches in a highly
ionized universe (x_HI < 0.01), and DLAs with the large required column densities
(N_HI > few x 10^{20} cm^{-2}) are both rare. As a result, when we include reasonable
prior probabilities for the line of sight (LOS) to intercept either a neutral
patch or a DLA at the required distance of ~ 40-60 comoving Mpc away from the
quasar, we find strong lower limits on the neutral fraction in the IGM, x_HI >
0.1 (at 95% confidence). This strengthens earlier claims that a substantial global
fraction of hydrogen in the z~6 IGM is in neutral form.'
article_processing_charge: No
article_type: original
author:
- first_name: Joshua
full_name: Schroeder, Joshua
last_name: Schroeder
- first_name: Andrei
full_name: Mesinger, Andrei
last_name: Mesinger
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: 'Schroeder J, Mesinger A, Haiman Z. Evidence of Gunn–Peterson damping wings
in high-z quasar spectra: Strengthening the case for incomplete reionization at
z ∼ 6–7. Monthly Notices of the Royal Astronomical Society. 2012;428(4):3058-3071.
doi:10.1093/mnras/sts253'
apa: 'Schroeder, J., Mesinger, A., & Haiman, Z. (2012). Evidence of Gunn–Peterson
damping wings in high-z quasar spectra: Strengthening the case for incomplete
reionization at z ∼ 6–7. Monthly Notices of the Royal Astronomical Society.
Oxford University Press. https://doi.org/10.1093/mnras/sts253'
chicago: 'Schroeder, Joshua, Andrei Mesinger, and Zoltán Haiman. “Evidence of Gunn–Peterson
Damping Wings in High-z Quasar Spectra: Strengthening the Case for Incomplete
Reionization at z ∼ 6–7.” Monthly Notices of the Royal Astronomical Society.
Oxford University Press, 2012. https://doi.org/10.1093/mnras/sts253.'
ieee: 'J. Schroeder, A. Mesinger, and Z. Haiman, “Evidence of Gunn–Peterson damping
wings in high-z quasar spectra: Strengthening the case for incomplete reionization
at z ∼ 6–7,” Monthly Notices of the Royal Astronomical Society, vol. 428,
no. 4. Oxford University Press, pp. 3058–3071, 2012.'
ista: 'Schroeder J, Mesinger A, Haiman Z. 2012. Evidence of Gunn–Peterson damping
wings in high-z quasar spectra: Strengthening the case for incomplete reionization
at z ∼ 6–7. Monthly Notices of the Royal Astronomical Society. 428(4), 3058–3071.'
mla: 'Schroeder, Joshua, et al. “Evidence of Gunn–Peterson Damping Wings in High-z
Quasar Spectra: Strengthening the Case for Incomplete Reionization at z ∼ 6–7.”
Monthly Notices of the Royal Astronomical Society, vol. 428, no. 4, Oxford
University Press, 2012, pp. 3058–71, doi:10.1093/mnras/sts253.'
short: J. Schroeder, A. Mesinger, Z. Haiman, Monthly Notices of the Royal Astronomical
Society 428 (2012) 3058–3071.
date_created: 2024-09-06T08:04:35Z
date_published: 2012-11-22T00:00:00Z
date_updated: 2024-09-25T08:53:21Z
day: '22'
doi: 10.1093/mnras/sts253
extern: '1'
intvolume: ' 428'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/sts253
month: '11'
oa: 1
oa_version: Published Version
page: 3058-3071
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Evidence of Gunn–Peterson damping wings in high-z quasar spectra: Strengthening
the case for incomplete reionization at z ∼ 6–7'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 428
year: '2012'
...